4210 Flow Meter
Section 2 Programming
2-26
This step determines the units value the flow meter will use to
record the totalized flow volume that passes by. GAL = gallons;
MGAL = millions of gallons; CF = cubic feet; L = liters; M3 =
cubic meters; AF = acre-feet.
2.6.6 Additional Parameters For the next several substeps you must have the appropriate
sensor attached to the flow meter's Parameter Port or Rain
Gauge Port (for the Rain Gauge or YSI 600 Sonde) to take
advantage of the capabilities. You can only have D.O./temper-
ature, pH/temperature or temperature alone on a given flow
meter, unless you use the YSI 600 Sonde. The YSI 600 Sonde pro-
vides multiple outputs simultaneously. You can use the Rain
Gauge with the YSI 600 sonde if you use a Y-connect cable.
Remember that programming for one type of sensor will prevent
the display of any references to the other in later program steps.
All sensors but the rain gauge are mounted fully submerged in
the flow stream. The pH and D.O. probes must be kept con-
stantly wet or they can be damaged.
Note
The pH or D. O. probes do not attach directly to the flow meter,
as their output signals are quite low. You must also have the
appropriate amplifier box connected between the probes and
the flow meter.
Their use in streams with intermittent flow (such as storm
drainage) is not recommended. Even in normal use, the pH
probe becomes contaminated over time and exposure, and will
eventually need replacement in any case.
You must have an Isco 674 Rain Gauge (or approved equiv-
alent) connected to the flow meter through the Rain Gauge Port
to sense rainfall. MM = millimeters. The rain gauge is
factory-calibrated. See Section 4 (Accessories) for more infor-
mation about the rain gauge. If you are not using a rain gauge,
you would select NOT MEASURED for this step.
• If you choose not to measure rainfall, no more references
to rainfall will appear in the rest of the program.
pH measurement determines the relative acidity or alkalinity of
a solution. You must have an Isco pH Probe (or approved equiv-
alent) connected to the flow meter through the parameter port to
sense pH. pH measurements range from 0 to 14 pH units, with
solutions below 7 considered acidic and solutions above 7,
alkaline. (Pure water has a pH of 7.)
RAIN GAUGE
• INCHES • • MM • • NOT MEASURED •
pH UNITS OF MEASURE
• pH • • NOT MEASURED •
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